Abstract: The centrifugal projector (1) of the present invention has: a side plate (11), a plurality of blades (3) attached to the side plate (11), a control cage (41-45) disposed on a radial inner side of the side plate for releasing the projection material between blades from an opening portion (41a-45e), a distributor (22), disposed on a radial inner side of the control cage, for mixing and supplying the projection material to the control cage, and a rotary shaft (14) for rotating the side plate, blades and distributor; wherein the blades are formed to be pitched so that a radial outer side (3c) thereof is positioned to a rear in the rotational direction (R1) compared to a radial inner side (3b) thereof; the control cage (41-45) has a plurality of opening windows (41a-45e), or a single opening window in which a portion or all of a plurality of opening windows are respectively overlapped and integrated into a single piece.

Abstract: The present invention relates to a safety arrangement for a floor surfacing machine (1) comprising at least one drive wheel (3, 4), a motor arrangement (5, 6) for propelling said drive wheel (3, 4), a surfacing apparatus (13) and a control unit (10, 11a) for controlling the operation of said motor arrangement (5, 6) and said surfacing apparatus (13). The arrangement comprises at least one detecting unit (55; 56, 57) connected to said control unit (10,11a) and adapted for determining a torque required for operating each drive wheel (3, 4) wherein said control unit (10,11a) is configured for preventing operation of said surfacing apparatus (13) if said required torque is lower than a predetermined limit value. The invention also relates to a method for obtaining safety in a floor surfacing machine (1).

Abstract: The present application discloses a single-point diamond dresser for a grinding wheel based on acoustic emission online monitoring, which includes a support module, an anti-interference module, a compression cooling module and an acoustic emission online monitoring module. An acoustic emission sensor monitors the dressing state of the grinding wheel online; a damping sheet and a damping interlayer greatly reduce external noise interference; a high pressure coolant causes an upward elastic deformation of an elastic spacer and the damping sheet, enlarging a contact force between the acoustic emission sensor and the core and moreover improving a sensitivity of the acoustic emission sensor; the coolant flows through the coolant passages in the core to cool a dressing area; current limiting passages, pressure relief cavities and perforated pressure-relief plates limit flow and reduce a pressure of the coolant, reducing the interference of the coolant on the grinding wheel dressing.

Abstract: A substrate processing apparatus includes: a first holding part configured to hold a substrate; a second holding part configured to hold the substrate; a sliding member configured to rotate about a vertical axis so that the sliding member slides on a back surface of the substrate; a revolution mechanism configured to revolve the sliding member under rotation about a vertical revolution axis; and a relative movement mechanism configured to horizontally move a relative position between the substrate and a revolution trajectory of the sliding member so that when the substrate is held by the first holding part, the sliding member slides on a central portion of the back surface of the substrate, and when the substrate is held by the second holding part, the sliding member slides on the peripheral portion of the back surface of the substrate under rotation.

Abstract: A method of removing material from a surface of a workpiece includes discharging a flow of fluid towards a workpiece at a pressure and a flow rate that facilitates forming a plurality of cavitation bubbles, and introducing abrasive media. The method includes exciting the abrasive media with the cavitation bubbles, removing material from the workpiece by an interaction between the cavitation bubbles and the abrasive media, and the surface of the workpiece.

Abstract: A saw wire to cut hard and brittle materials is disclosed that comprises a steel wire that is provided with bends with segments in between. The average degree of bending of the bends is between 0.5% and 5%. Such a saw wire has a higher breaking load compared to saw wires having a conventional, higher average degree of bending. A method to measure the curvature is described as well as a process to make the inventive saw wire. The invention is applicable to any shaped saw wire for example a single crimped saw wire, a saw wire with at least two crimps in different planes, a saw wire with crimps rotating in a plane.

Abstract: A polishing pad is provided. The polishing pad, disposed on a polishing platen and suitable for a polishing process, includes a polishing layer, an adhesive layer and at least one adhesion-reducing interface layer. The adhesive layer is disposed between the polishing layer and the polishing platen. The at least one adhesion-reducing interface layer is disposed between the adhesive layer and the polishing layer and/or disposed between the adhesive layer and the polishing platen. An area of the at least one adhesion-reducing interface layer is smaller than an area of the adhesive layer.

Abstract: The present disclosure relates to a contiguous compression wire sprang polishing apparatus that continuously polishes end surfaces of compression wise springs (10) by upper and lower chain conveyers 100 and 200 and grinding units 300.

Abstract: In a method for producing open-pore, ceramic-bonded grinding tools, a pore former mixture consisting of at least two polymers having different firing curves, the maxima of which differ by at least 20° C., is used. The polymers are preferably thermoplastics that can be decomposed exclusively into CO2 and water during combustion. The resulting grinding tool has a multimodal pore size distribution.

Abstract: The present invention provides a roll shaft having high corrosion resistance and rigidity against bending, and a brush roll comprising the roll shaft. The roll shaft 2 is for use in a brush roll 1 for brushing a strip of metal sheet. The roll shaft includes: a shaft body 7 to which multiple annular discs 4 having multiple brush bristles 5 implanted around the outer peripheral edge of the discs 4 are attached; key bases 8 attached to recessed grooves 72 provided on the outer peripheral edge of the shaft body 7, the key bases comprising keyways 80 into which insertion members 6 projecting from the inner peripheral edge of the annular discs 4 are fitted, and the key bases 8 comprising a corrosion-resistant metallic material, a corrosion-resistant alloy, or a corrosion-resistant resin material.

Abstract: A method for dressing a grinding worm using a dressing roll that engages the grinding worm to profile its helical grinding profile. The abrasive profile of the dressing roll is at least partially tooth-shaped in a radial cross section and extends radially from a root region to a tip region. The dressing roll is produced by: a) producing a counterpart having an inner surface; b) positioning and fixing a layer of abrasive particles on the tooth-shaped surface; c) producing a disk-shaped base body of the dressing roll and connecting the base body with a carrier layer for the abrasive particles; d) demolding the base body; e) profiling the base body. Step a) includes providing the counterpart with the surface so that the distance between the profiled surface and the abrasive profile changes during advancing from the root region to the tip region at least at one flank of the surface, measured in the radial cross section perpendicular to the profiled surface.

Abstract: A method for dressing a grinding worm using a dressing roll that engages the grinding worm to profile its helical grinding profile. The dressing roll is produced by: a) producing a disk-shaped base body a profiled surface for receiving a layer of abrasive particles, wherein the surface is at least partially tooth-shaped in a radial cross section, b) positioning the abrasive particles on the profiled surface, c) profiling the base body provided with abrasive particles by removing outer sections of the abrasive particles with a profiling tool so that the abrasive profile of the dressing roll is created. Production of the profiled surface takes place in step a) so that the distance between the profiled surface and the abrasive profile changes during advancing from the root region to the tip region at a flank of the tooth-shaped surface, measured in the radial cross section perpendicular to the profiled surface.

Abstract: A dust shroud having a shroud body with a vacuum port and a tool connection, the shroud body including a top wall and at least one side wall extending downwardly from about a perimeter of the top wall that defines a dust receiving opening, the shroud body having a top wall opening and the tool connection including a flexible fitting with a flexible fitting base joined to the top wall and extending within the top wall opening, the flexible fitting including a plurality of flexible fingers with a base finger portion and an outer finger portion that extends away from top wall and is selectively with a mounting point of the hand held tool and the flexible fingers allowing selective controlled relative movement between the dust shroud and the hand held tool, the fingers having a finger spacing between adjacent flexible fingers and the outwardly extending flexible fingers having a finger length between the top wall and the distal finger end that is greater than 0.

Abstract: The present disclosure relates generally to a polishing article, and apparatus and methods of chemical mechanical polishing substrates using the polishing article. In some embodiments, the polishing article, such as a polishing pad, includes multiple layers in which one or more layers (i.e., at least the top layer) includes a plurality of nano-fibers that a positioned to contact a substrate during a polishing process. In one embodiment, a polishing article comprises a layer having a thickness less than about 0.032 inches, and the layer comprising fibers having a diameter of about 10 nanometers to about 200 micro meters.

Abstract: A system, a control method and an apparatus for chemical mechanical polishing (CMP) are introduced in the present application. The CMP apparatus may include a polishing pad, a first sensor, a polishing head and a condition. The polishing pad has a plurality of groves arranged randomly or in a specific pattern. The first sensor is configured to measure the pad profile of the polishing pad, where the pad profile includes the depth of each of the grooves on the polishing pad. The polishing head and the conditioner are operated according to at least one polishing condition, and the at least one polishing condition is tuned according to the pad profile.

Abstract: A method for decontaminating support surfaces of a wafer chuck, such as a wafer chuck, entails lightly passing a treatment tool having a nominally flat contacting surface over the regions of the chuck where contaminants are to be removed. The treatment tool and the chuck surface may have about the same hardness. The treatment tool may be minimally constrained so that it may conform to the surface being processed. When the treatment tool is contacted to a flat surface, the locust of contact may be in the form of a circle, ring or annulus. At higher application pressures, the treatment tool will abrade the chuck, which here is to be avoided, or at least minimized. Thus, the instant inventors have discovered that the same treatment tool that is used to engineer the elevation or profile of the surface, and its roughness, at lower application pressures can be used to remove grinding debris and other contaminants from the surface.

Abstract: One aspect of embodiment provides a wafer polishing chamber, including a wafer transfer part; a polishing part provided with an upper surface plate and lower surface plate, and configured to polish the wafer transferred from the wafer transfer part; a partition wall configured to separate positions where the transfer part and the polishing part are disposed; a plurality of fan units configured to introduce air; and a plurality of exhaust units configured to exhaust air, wherein the fan unit may be provided in at least one in an upper portion of the polishing part.

Abstract: A polishing device configured to polish a glass substrate is disclosed, including a polishing wheel fixedly arranged, a cooling pipe, and a movable platform. The polishing wheel has an outer peripheral polishing surface, the glass substrate is placed on the platform and is driven by the platform to move so as to make the outer peripheral polishing surface polish the predetermined polishing surface of the glass substrate; the polishing wheel further has a chamber, and the cooling pipe containing a coolant is disposed in the chamber to decrease a temperature of the chamber and then to make temperatures of the outer peripheral polishing surface and the predetermined polishing surface during polishing is lower than a preset temperature. The disclosure solves the problem of high polishing temperature of the polishing wheel and the glass substrate, thereby enhancing the service life of the polishing wheel and the yield of the glass substrate.

Abstract: Disclosed is a device for removing tool joint edge burrs from a cap opening of a wheel. The cap opening of the wheel is an opening configured to mount a decorative cap of the wheel. The tool joint edge burrs are formed inside the cap opening of the wheel during machining the wheel and are a circular edge inside the cap opening. The device includes a cutter system which is configured to remove the tool joint edge burrs from the cap opening of the wheel by a first cutting edge and a second cutting edge of the cutter system.

Abstract: An apparatus for sharpening and/or beveling of either a ski or snowboard side edge or base edge is provided. It comprises a tool support bar, a wear plate, a shim and an indexing pad that are adapted to be handheld by a technician using the apparatus. Each bar includes two tool support surfaces and may be detached and reattached to the wear plate. The shim and indexing pad are also attachable to the apparatus at a plurality of locations that provide multiple angular orientations for a sharpening tool used with the apparatus.